The Tambo, Ica, and Tigre are all Peruvian rivers. The Tambo is a river located in the northern part of Peru, and it is a tributary of the Marañón River. The Ica is a river located in the south of Peru, and it is a tributary of the Pacific Ocean. The Tigre is a river located in the central part of Peru, and it is a tributary of the Ucayali River. All three rivers are important sources of water for the people of Peru.